src/test/java/org/robolectric/shadows/RadioButtonTest.java

package org.robolectric.shadows;

import android.widget.RadioButton;
import android.widget.RadioGroup;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.TestRunners;

import static org.fest.assertions.api.Assertions.assertThat;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

@RunWith(TestRunners.WithDefaults.class)
public class RadioButtonTest {
    @Test
    public void canBeExplicitlyChecked() throws Exception {
        RadioButton radioButton = new RadioButton(Robolectric.application);
        assertFalse(radioButton.isChecked());

        radioButton.setChecked(true);
        assertTrue(radioButton.isChecked());

        radioButton.setChecked(false);
        assertFalse(radioButton.isChecked());
    }

    @Test
    public void canBeToggledBetweenCheckedState() throws Exception {
        RadioButton radioButton = new RadioButton(Robolectric.application);
        assertFalse(radioButton.isChecked());

        radioButton.toggle();
        assertTrue(radioButton.isChecked());

        radioButton.toggle();
        assertFalse(radioButton.isChecked());
    }

    @Test
    public void canBeClickedToToggleCheckedState() throws Exception {
        RadioButton radioButton = new RadioButton(Robolectric.application);
        assertFalse(radioButton.isChecked());

        radioButton.performClick();
        assertTrue(radioButton.isChecked());

        radioButton.performClick();
        assertFalse(radioButton.isChecked());
    }

    @Test
    public void shouldInformRadioGroupThatItIsChecked() throws Exception {
        RadioButton radioButton1 = new RadioButton(Robolectric.application);
        radioButton1.setId(99);
        RadioButton radioButton2 = new RadioButton(Robolectric.application);
        radioButton2.setId(100);

        RadioGroup radioGroup = new RadioGroup(Robolectric.application);
        radioGroup.addView(radioButton1);
        radioGroup.addView(radioButton2);

        radioButton1.setChecked(true);
        assertThat(radioGroup.getCheckedRadioButtonId()).isEqualTo(radioButton1.getId());

        radioButton2.setChecked(true);
        assertThat(radioGroup.getCheckedRadioButtonId()).isEqualTo(radioButton2.getId());
    }
}